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Bell and Gossett series 100 noise

Just replaced B&G series 100 motor and coupling. On start up, runs quiet and boiler activates. Within a few seconds, get a noise in the area of the bearing assembly. I've ordered a new assembly and will be installing it. Any other possible causes for the noise?

Comments

  • Gordy
    Gordy Member Posts: 9,514
    Sounds like pebbles?
  • JohnNY
    JohnNY Member Posts: 2,761
    Coupler?
    Contact John "JohnNY" Cataneo, Master Plumber
    in New York
    in New Jersey
    for Consulting Work
    or take his class.
  • HVACNUT
    HVACNUT Member Posts: 4,205
    Didn't install a wet rotor pump?
    Zmankcopp
  • Ironman
    Ironman Member Posts: 6,581
    edited December 2018
    Why waste your time and money on that antiquated thing? Install a wet rotor circ like a Grundfos ups15-58 or Taco 007. Either will bolt right in place of the series 100 at 1/4 the cost.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
    ZmanSTEVEusaPA
  • unclejohn
    unclejohn Member Posts: 1,751
    Did the new motor come with new rubber mounts. If it did then yes it's the bearing assembly.
  • sheets105
    sheets105 Member Posts: 2
    Thank you everyone. The motor assembly is brand new as is the coupler. I've just noticed there are metal shavings all over the bearing assembly, so guessing there is a problem in there. Should have the new bearing assembly today, so we will see....
  • JUGHNE
    JUGHNE Member Posts: 8,962
    Those were and hopefully still are a great workhorse.
    I have repaired a few and learned that, (working for homeowners) when the bearing seal goes out it is time for an upgrade.
    Hopefully you get good years out of it.
    Just observe the oiling instructions, originally there were 3 points.
    Do not over oil the motor, if there are ports.
  • Wonderful circulator. There are many installed on my route and I have great respect for them.

    Youtube video helps, especially minute 5:00 when they show you how much oil to use.

    Often wrong, never in doubt.
  • HVACNUT
    HVACNUT Member Posts: 4,205
    > @Alan (California Radiant) Forbes said:
    > Wonderful circulator. There are many installed on my route and I have great respect for them.
    >
    > Youtube video helps, especially minute 5:00 when they show you how much oil to use.

    Gretzky is "The Geat One" but eventually he did have to hang up his skates.
    Nobody will ever top him even though the kids today are stronger, faster, more conditioned players. But Gretzky cant compete anymore.
  • Gordy
    Gordy Member Posts: 9,514
    Lol I remember when the coupler broke at 3:00am on my series 100 HV, and ceiling radiant. I thought the house was coming apart.........